Motoforce Carburetor Kit Racing PWK 32mm with air filter and jet kit (145 - 170). The kit includes a 32mm PWK carburetor with power jet, a foam air filter (49mm) and a carburetor jet kit with main jets ranging from size 145 to 170. Excellent value for money, and you don't have to even think about which air filter and jets are suitable for your carb.